[Rhodes22-list] CB trunk Surgery - Roger's Recommended MOC
Todd Tavares
sprocket80 at mail.com
Thu Dec 9 23:03:53 EST 2004
Roger,
I thought MEK was outlawed? I can not stress enough how important it is to wear protective clothing, gloves, a high quality respirator and work in a well ventillated area. Years ago when I was in the Army, we used to strip paint from aircraft and wheeled vehicles using MEK wearing only rubber gloves. Then spray paint them without respirators and wash our hands with toluene. MSDS? We didn't need no stinking MSDS. You will never know the effects of not following good safety protocols until years later when you begin to see signs of liver and kidney damage.
Work safe---or not at all.
Todd
----- Original Message -----
From: "Roger Pihlaja" <cen09402 at centurytel.net>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Subject: Re: [Rhodes22-list] CB trunk Surgery - Roger's Recommended MOC
Date: Thu, 9 Dec 2004 17:27:34 -0500
>
> Todd,
>
> Funny you should ask. I once had to do a project that involved spray
> coating an epoxy binder into a delicate nonwoven C-fiber batting. The
> unthickened epoxy was too viscous to atomize in a 2-fluid spray nozzle.
> However, it turns out that uncured West system epoxy & catalysts (They are
> really epoxy products made by the Dow Chemical Co. - shhh, don't tell
> anyone!) are completely soluble in ketones like acetone or methyl ethyl
> ketone (MEK). If Lou is not getting good penetration into the cement; then,
> he can thin out the uncured epoxy with acetone in practically any proportion
> he needs to get the viscosity low enough. Warning, the acetone will be
> evaporating during and after application & will create a REALLY flammable
> vapor in the vicinity of the cement. So, good ventillation will be very
> critical in this operation.
>
> Roger Pihlaja
> S/V Dynamic Equilibrium
>
> ----- Original Message -----
> From: "Todd Tavares" <sprocket80 at mail.com>
> To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> Sent: Thursday, December 09, 2004 5:10 PM
> Subject: Re: [Rhodes22-list] CB trunk Surgery - Roger's Recommended MOC
>
>
> > Roger,
> >
> > Is there a way to thin a small amount of epoxy to brush onto the exposed
> cement first?
> >
> > Todd
> >
> >
> > ----- Original Message -----
> > From: "Roger Pihlaja" <cen09402 at centurytel.net>
> > To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > Subject: Re: [Rhodes22-list] CB trunk Surgery - Roger's Recommended MOC
> > Date: Thu, 9 Dec 2004 15:59:18 -0500
> >
> > >
> > > Steve,
> > >
> > > MOC property = Material Of Construction property
> > >
> > > What I was refering to was to trowel in uncured 3M 5200 polyurethane
> > > adhesive directly over the cement. The 3M 5200 would be the patch in
> this
> > > case. Even cured, this material is no where near stiff enough for this
> > > application.
> > >
> > > I wouldn't use 3M 5200 to attach some other patch material to the cement
> > > either. 3M 5200 is too viscous to properly soak into the cement to
> develop
> > > a strong bond with it.
> > >
> > > I suggested using untickened epoxy as a tie layer with the cement. The
> low
> > > viscosity epoxy will soak into the porosity in the cement, creating a
> deep
> > > mechanical & chemical bond with the cement.
> > >
> > > Roger Pihlaja
> > > S/V Dynamic Equilibrium
> > >
> > > ----- Original Message -----
> > > From: "Steve" <rhodes2282 at yahoo.com>
> > > To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > > Sent: Thursday, December 09, 2004 3:43 PM
> > > Subject: Re: [Rhodes22-list] CB trunk Surgery - Roger's Recommended MOC
> > >
> > >
> > > > Roger
> > > > 3-M 5200 polyurethane caulk to
> > > > > build up the patch as some
> > > > > others have suggested. Polyurethane caulk has the
> > > > > wrong MOC properties for
> > > > > this application.
> > > >
> > > > I don't get what you mean here. I wasn't talking
> > > > about building up a patch with 3M 5200; 3M 5200 is the
> > > > patch if you when that route. Also, what are you
> > > > talking about when you say MOC properties?
> > > > Steve
> > > >
> > > >
> > > > --- Roger Pihlaja <cen09402 at centurytel.net> wrote:
> > > >
> > > > > Lou,
> > > > >
> > > > > I would use prefabricated G-10 sheets. G-10 is a
> > > > > composite material made
> > > > > from oriented glass fiber & epoxy and it is very
> > > > > stiff. You will be able to
> > > > > cut it with a saber saw to an exact fit into
> > > > > whatever size & shape the hole
> > > > > in your centerboard well ends up being. You can
> > > > > order G-10 in panels as
> > > > > small as 12 inch X 12 inch up to as large as 36 inch
> > > > > X 48 inch in any
> > > > > thickness ranging from 1/32 inch to 2 inch. Use an
> > > > > unthickened epoxy tie
> > > > > layer soaked into the cement and also on the cement
> > > > > side of the G-10 patch.
> > > > > Then, I would use a fiberglass tape laminated with
> > > > > epoxy to bridge the
> > > > > remaining gap between the G-10 patch and the old
> > > > > centerboard well. The
> > > > > centerboard well side of the G-10 patch will still
> > > > > need the final coat of
> > > > > epoxy loaded up with West 422 Barrier Additive.
> > > > > G-10 sheets can be ordered
> > > > > from:
> > > > >
> > > > > McMaster-Carr Supply Company
> > > > > 473 Ridge Rd.
> > > > > Dayton, NJ 08810-0317
> > > > > 732-329-3200 (Sales)
> > > > > www.mcmaster.com
> > > > >
> > > > > Tell them you want "Grade G-10/FR4 Garolite" in
> > > > > whatever sheet size &
> > > > > thickness you need.
> > > > >
> > > > > Note, do not use 3-M 5200 polyurethane caulk to
> > > > > build up the patch as some
> > > > > others have suggested. Polyurethane caulk has the
> > > > > wrong MOC properties for
> > > > > this application.
> > > > >
> > > > > Roger Pihlaja
> > > > > S/V Dynamic Equilibrium
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Lou Rosenberg" <lsr3 at MAIL.nyu.edu>
> > > > > To: "The Rhodes 22 mail list"
> > > > > <rhodes22-list at rhodes22.org>
> > > > > Sent: Thursday, December 09, 2004 11:22 AM
> > > > > Subject: Re: [Rhodes22-list] CB trunk surgery
> > > > >
> > > > >
> > > > > > Roger,
> > > > > > I purchase a small cutting disc for my dremel
> > > > > yesterday and hope to
> > > > > > begin the work on Sun.
> > > > > > My plan is to:
> > > > > > Remove the cement which is causing the bulge,
> > > > > then I will have to
> > > > > > insert a thin plastic or metal piece to cover the
> > > > > cement as the
> > > > > > epoxy will not bond directly to the cement
> > > > > effectively.
> > > > > > I will sand the thin plastic down for good
> > > > > adherance quality and
> > > > > > hope to just fit it under snugly to the
> > > > > surrounding trunk.
> > > > > > any comments/ suggestions??
> > > > > > Lou
> > > > > >
> > > > > > __________________________________________________
> > > > > > Use Rhodes22-list at rhodes22.org, Help?
> > > > > www.rhodes22.org/list
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > __________________________________________________
> > > > > Use Rhodes22-list at rhodes22.org, Help?
> > > > > www.rhodes22.org/list
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > > __________________________________
> > > > Do you Yahoo!?
> > > > Jazz up your holiday email with celebrity designs. Learn more.
> > > > http://celebrity.mail.yahoo.com
> > > > __________________________________________________
> > > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> > > >
> > > >
> > >
> > >
> > > __________________________________________________
> > > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> > --
> > ___________________________________________________________
> > Sign-up for Ads Free at Mail.com
> > http://promo.mail.com/adsfreejump.htm
> >
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
> >
> >
> >
>
>
> __________________________________________________
> Use Rhodes22-list at rhodes22.org, Help? www.rhodes22.org/list
--
___________________________________________________________
Sign-up for Ads Free at Mail.com
http://promo.mail.com/adsfreejump.htm
More information about the Rhodes22-list
mailing list